public class ThreadDemo6 {
    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("11111");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        });

        System.out.println("2"+t.isAlive());
        t.start();
        System.out.println("3"+t.isAlive());
        Thread.sleep(2000);
        System.out.println("4"+t.isAlive());

    }
}
